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| author | Christian Hansen <chansen3@cisco.com> | 2018-08-18 01:45:02 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-18 02:20:28 +0300 |
| commit | 59ae96ffc3a6731c3b85f9925e07e893d392e814 (patch) | |
| tree | 4ee3bc1743d05ec5c123d178dacfc441bc093f72 /Documentation | |
| parent | 7f1d23e607185e07e5df2a806a989c24627aef41 (diff) | |
| download | linux-59ae96ffc3a6731c3b85f9925e07e893d392e814.tar.xz | |
tools/vm/page-types.c: add support for idle page tracking
Add a flag which causes page-types to use the kernels's idle page
tracking to mark pages idle. As the tool already prints the idle flag
if set, subsequent runs will show which pages have been accessed since
last run.
[akpm@linux-foundation.org: simplify mark_page_idle()]
[chansen3@cisco.com: reorganize mark_page_idle() logic, add docs]
Link: http://lkml.kernel.org/r/20180706172237.21691-1-chansen3@cisco.com
Link: http://lkml.kernel.org/r/20180612153223.13174-1-chansen3@cisco.com
Signed-off-by: Christian Hansen <chansen3@cisco.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/mm/idle_page_tracking.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/admin-guide/mm/idle_page_tracking.rst b/Documentation/admin-guide/mm/idle_page_tracking.rst index 6f7b7ca1add3..df9394fb39c2 100644 --- a/Documentation/admin-guide/mm/idle_page_tracking.rst +++ b/Documentation/admin-guide/mm/idle_page_tracking.rst @@ -65,6 +65,11 @@ workload one should: are not reclaimable, he or she can filter them out using ``/proc/kpageflags``. +The page-types tool in the tools/vm directory can be used to assist in this. +If the tool is run initially with the appropriate option, it will mark all the +queried pages as idle. Subsequent runs of the tool can then show which pages have +their idle flag cleared in the interim. + See :ref:`Documentation/admin-guide/mm/pagemap.rst <pagemap>` for more information about ``/proc/pid/pagemap``, ``/proc/kpageflags``, and ``/proc/kpagecgroup``. |